车辆荷载作用下斜拉索参数振动分析

When the frequency of external load excitation is proportional to the frequency of the cable, the cable will have parametric vibration and produce a very large displacement response, and will bring very serious disasters to vehicles, pedestrians,bridge and cable, which has attracted the attention of scholars and the public. Taking a super-span cable-stayed bridge as the research object, this paper adopts ANSYS finite element analysis method to study the possibility of large value parametric vibration of cable-stayed cable, considering vehicle-bridge coupling and deck irregularity and other factors. Due to the speed limit requirement of cable-stayed bridge, the research shows that if the vehicles on the bridge are running at the specified speed, the displacement excitation of the cable will not cause large parametric vibration of the cable.